- EPA's UCMR 5 testing looked for 30 contaminants here and found 5.
- PFOS (a PFAS): found in 4 of 4 samples, average 6.6 ppt, highest 7.4 ppt (EPA UCMR 5 testing, Sep 2024–May 2026) PFOA or PFOS averaged above 4.0 ppt in UCMR 5 testing
- PFOA (a PFAS): found in 4 of 4 samples, average 5.7 ppt, highest 6.4 ppt (EPA UCMR 5 testing, Sep 2024–May 2026) PFOA or PFOS averaged above 4.0 ppt in UCMR 5 testing
- PFPeA (a PFAS): found in 4 of 4 samples, average 5.5 ppt, highest 6 ppt (EPA UCMR 5 testing, Sep 2024–May 2026)
- PFHxA (a PFAS): found in 4 of 4 samples, average 4.8 ppt, highest 5.1 ppt (EPA UCMR 5 testing, Sep 2024–May 2026)
- PFBS (a PFAS): found in 4 of 4 samples, average 4.3 ppt, highest 4.9 ppt (EPA UCMR 5 testing, Sep 2024–May 2026)
- Lead, 90th percentile: 0.5 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2022–Dec 31, 2024). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
Public EPA test results
North Charleston, SC tap water: what EPA records show
EPA SC1820008 · serves North Charleston, SC · about 26,536 people (EPA SDWIS)
This report shows EPA's federal records for this water system: UCMR 5 testing, lead testing and violations. It isn't a test of the water at your tap, and it has no Water Score.
Public EPA test results
DCWS Ashley Phosphate (Sc1820008) (EPA SC1820008)
EPA data as of October 14, 2026. For North Charleston's main utility, DCWS Ashley Phosphate (Sc1820008): We found no health-based violations in EPA's records for this system (SC1820008) since July 1, 2021, as of October 14, 2026. This water system averaged above 4.0 ppt for PFOA or PFOS in EPA's UCMR 5 testing.
What EPA records show for DCWS Ashley Phosphate (Sc1820008), as of October 14, 2026
We found no health-based violations in EPA's records for this system (SC1820008) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for DCWS Ashley Phosphate (Sc1820008) (SDWIS). Data as of October 14, 2026.
Lead, 90th percentile: 0.5 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2022–Dec 31, 2024). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
This water system averaged above 4.0 ppt for PFOA or PFOS in EPA's UCMR 5 testing.
EPA's UCMR 5 testing looked for 30 contaminants here and found 5.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does DCWS Ashley Phosphate (Sc1820008) use chloramine?
We didn't find chloramine in DCWS Ashley Phosphate (Sc1820008)'s EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.